Nonequilibrium Transport at a Dissipative Quantum Phase Transition

被引:31
作者
Chung, Chung-Hou [1 ]
Le Hur, Karyn [2 ]
Vojta, Matthias [3 ]
Woelfle, Peter [4 ,5 ]
机构
[1] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30050, Taiwan
[2] Yale Univ, Dept Phys & Appl Phys, New Haven, CT USA
[3] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany
[4] Univ Karlsruhe, Inst Theorie Kondensierten Mat, D-76128 Karlsruhe, Germany
[5] Forschungszentrum, INT, D-76021 Karlsruhe, Germany
关键词
D O I
10.1103/PhysRevLett.102.216803
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We investigate the nonequilibrium transport near a quantum phase transition in a generic and relatively simple model, the dissipative resonant level model, that has many applications for nanosystems. We formulate a rigorous mapping and apply a controlled frequency-dependent renormalization group approach to compute the nonequilibrium current in the presence of a finite bias voltage V and a finite temperature T. For V -> 0, we find that the conductance has its well-known equilibrium form, while it displays a distinct nonequilibrium profile at finite voltage.
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收藏
页数:4
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